Definition of Captcha

Noun: Captcha

1. (computing) a challenge question that can only easily be answered by a human, used to prevent access to a system by an automated program; typically a distorted image of letters and numbers that the user has to identify
   - CAPTCHA

See also:
captans
caption

Anagrams containing the word Captcha

catchpa acaptch hacaptc chacapt tchacap ptchaca aptchac